I do not understand, why unidentified? The plans are named. The Russian and Serbocroatian are close enough for me to guess that the first two signs mean general view and the third one should be layout view.
As for transliterating Cyrillic letters into Latin ones, a lot of letters are identical, the names of the aircrafts are as follows:
1. SB 2-AM-8 TK3
2. and 3. DB 2M-82F TK3